//! This crate provides functionality for adding things
//! 模块级别注释
//! 
//! # Examples
//! ```
//! use doctest_demo::sum;
//! 
//! let work_a = 4;
//! let work_b = 34;
//! let total_work = sum(work_a, work_b);
//! ```

/// Sum two arguments
/// 
/// # Examples
/// 
/// ```
/// assert_eq!(doctest_demo::sum(1, 1), 2)
/// ```
pub fn sum(a: i8, b: i8) -> i8 {
    a + b
}
